How do you change the spark plugs on a 1999 Oldsmobile bravada?

To change the spark plugs on a 1999 Oldsmobile Bravada, first, ensure the engine is cool and disconnect the negative battery cable. Remove the ignition coil or spark plug wires from the spark plugs, then use a spark plug socket and ratchet to carefully unscrew the old plugs. Before installing the new plugs, check the gap with a gauge and adjust if necessary. Finally, insert the new plugs, torque them to the manufacturer's specifications, reconnect the wires or coils, and reconnect the battery.